{
  "ptid_time": "016_S_0538_2007-03-01",
  "img_path": "/data/qiuhui/data/adni/images/016_S_0538/2007-03-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 58,155 mm³, 23.7% above the reference mean. With a Z-score of 0.69 (75.4th percentile), this represents normal volume ; hippocampal volume measures 7,897 mm³, 13.3% above the reference mean. With a Z-score of 1.15 (87.5th percentile), this represents mild enlargement; whole brain volume measures 1,099,090 mm³, 6.8% above the reference mean. With a Z-score of 0.89 (81.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,312 mm³, 8.6% above the reference mean. With a Z-score of 0.57 (71.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,821 mm³, 1.4% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,576 mm³, 2.0% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume . ",
  "text_data": "Age is 83.2 years. Gender is Male. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges or even slightly above average, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. The MMSE score of 28 is within the normal range, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T00:02:41.340178"
}